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git_testing.go
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git_testing.go
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package repository
import (
"fmt"
"io/ioutil"
"log"
"os"
"os/exec"
"strings"
"testing"
"github.com/stretchr/testify/require"
"golang.org/x/crypto/openpgp"
"golang.org/x/crypto/openpgp/armor"
)
// This is intended for testing only
func CreateTestRepo(bare bool) TestedRepo {
dir, err := ioutil.TempDir("", "")
if err != nil {
log.Fatal(err)
}
var creator func(string) (*GitRepo, error)
if bare {
creator = InitBareGitRepo
} else {
creator = InitGitRepo
}
repo, err := creator(dir)
if err != nil {
log.Fatal(err)
}
config := repo.LocalConfig()
if err := config.StoreString("user.name", "testuser"); err != nil {
log.Fatal("failed to set user.name for test repository: ", err)
}
if err := config.StoreString("user.email", "testuser@example.com"); err != nil {
log.Fatal("failed to set user.email for test repository: ", err)
}
return repo
}
// CreatePubkey returns an armored public PGP key.
func CreatePubkey(t *testing.T) string {
// Generate a key pair for signing commits.
pgpEntity, err := openpgp.NewEntity("First Last", "", "fl@example.org", nil)
require.NoError(t, err)
// Armor the public part.
pubBuilder := &strings.Builder{}
w, err := armor.Encode(pubBuilder, openpgp.PublicKeyType, nil)
require.NoError(t, err)
err = pgpEntity.Serialize(w)
require.NoError(t, err)
err = w.Close()
require.NoError(t, err)
armoredPub := pubBuilder.String()
return armoredPub
}
// SetupSigningKey creates a GPG key and sets up the local config so it's used.
// The key id is set as "user.signingkey". For the key to be found, a `gpg`
// wrapper which uses only a custom keyring is created and set as "gpg.program".
// Finally "commit.gpgsign" is set to true so the signing takes place.
//
// Returns the armored public key.
func SetupSigningKey(t testing.TB, repo TestedRepo, email string) string {
keyId, armoredPub, gpgWrapper := CreateKey(t, email)
SetupKey(t, repo, email, keyId, gpgWrapper)
return armoredPub
}
func SetupKey(t testing.TB, repo TestedRepo, email, keyId, gpgWrapper string) {
config := repo.LocalConfig()
if email != "" {
err := config.StoreString("user.email", email)
require.NoError(t, err)
}
if keyId != "" {
err := config.StoreString("user.signingkey", keyId)
require.NoError(t, err)
}
if gpgWrapper != "" {
err := config.StoreString("gpg.program", gpgWrapper)
require.NoError(t, err)
}
err := config.StoreString("commit.gpgsign", "true")
require.NoError(t, err)
}
func CreateKey(t testing.TB, email string) (keyId, armoredPub, gpgWrapper string) {
// Generate a key pair for signing commits.
entity, err := openpgp.NewEntity("First Last", "", email, nil)
require.NoError(t, err)
keyId = entity.PrivateKey.KeyIdString()
// Armor the private part.
privBuilder := &strings.Builder{}
w, err := armor.Encode(privBuilder, openpgp.PrivateKeyType, nil)
require.NoError(t, err)
err = entity.SerializePrivate(w, nil)
require.NoError(t, err)
err = w.Close()
require.NoError(t, err)
armoredPriv := privBuilder.String()
// Armor the public part.
pubBuilder := &strings.Builder{}
w, err = armor.Encode(pubBuilder, openpgp.PublicKeyType, nil)
require.NoError(t, err)
err = entity.Serialize(w)
require.NoError(t, err)
err = w.Close()
require.NoError(t, err)
armoredPub = pubBuilder.String()
// Create a custom gpg keyring to be used when creating commits with `git`.
keyring, err := ioutil.TempFile("", "keyring")
require.NoError(t, err)
// Import the armored private key to the custom keyring.
priv, err := ioutil.TempFile("", "privkey")
require.NoError(t, err)
_, err = fmt.Fprint(priv, armoredPriv)
require.NoError(t, err)
err = priv.Close()
require.NoError(t, err)
err = exec.Command("gpg", "--no-default-keyring", "--keyring", keyring.Name(), "--import", priv.Name()).Run()
require.NoError(t, err)
// Import the armored public key to the custom keyring.
pub, err := ioutil.TempFile("", "pubkey")
require.NoError(t, err)
_, err = fmt.Fprint(pub, armoredPub)
require.NoError(t, err)
err = pub.Close()
require.NoError(t, err)
err = exec.Command("gpg", "--no-default-keyring", "--keyring", keyring.Name(), "--import", pub.Name()).Run()
require.NoError(t, err)
// Use a gpg wrapper to use a custom keyring containing GPGKeyID.
gpgWrapper = createGPGWrapper(t, keyring.Name())
return
}
// createGPGWrapper creates a shell script running gpg with a specific keyring.
func createGPGWrapper(t testing.TB, keyringPath string) string {
file, err := ioutil.TempFile("", "gpgwrapper")
require.NoError(t, err)
_, err = fmt.Fprintf(file, `#!/bin/sh
exec gpg --no-default-keyring --keyring="%s" "$@"
`, keyringPath)
require.NoError(t, err)
err = file.Close()
require.NoError(t, err)
err = os.Chmod(file.Name(), os.FileMode(0700))
require.NoError(t, err)
return file.Name()
}
func SetupReposAndRemote() (repoA, repoB, remote TestedRepo) {
repoA = CreateTestRepo(false)
repoB = CreateTestRepo(false)
remote = CreateTestRepo(true)
remoteAddr := "file://" + remote.GetPath()
err := repoA.AddRemote("origin", remoteAddr)
if err != nil {
log.Fatal(err)
}
err = repoB.AddRemote("origin", remoteAddr)
if err != nil {
log.Fatal(err)
}
return repoA, repoB, remote
}